Add passive: false to touch_scheduling_cases to avoid interventions.

tools/perf/page_sets/tough_scheduling_cases/touch_handler_scrolling.html

Index: tools/perf/page_sets/tough_scheduling_cases/touch_handler_scrolling.html
diff --git a/tools/perf/page_sets/tough_scheduling_cases/touch_handler_scrolling.html b/tools/perf/page_sets/tough_scheduling_cases/touch_handler_scrolling.html
index c49833b6ce66c5c6b9783c2afe3d4a30b46713fa..1a0552d1a925894db361dcf50ec9f5330f1db44e 100644
--- a/tools/perf/page_sets/tough_scheduling_cases/touch_handler_scrolling.html
+++ b/tools/perf/page_sets/tough_scheduling_cases/touch_handler_scrolling.html
@@ -38,12 +38,13 @@
     }
 
     function startExperiment() {
-      window.addEventListener('touchstart', onTouchStart);
-      window.addEventListener('touchmove', onTouchMove);
+      // Pass 'passive' false in to prevent any intervention.
+      window.addEventListener('touchstart', onTouchStart, {passive: false});
+      window.addEventListener('touchmove', onTouchMove, {passive: false});
       window.addEventListener('touchend', onTouchEnd);
       window.addEventListener('touchleave', onTouchEnd);
       window.addEventListener('touchcancel', onTouchEnd);
-      window.addEventListener('wheel', onMouseWheel);
+      window.addEventListener('wheel', onMouseWheel, {passive: false});
     }
 
     window.addEventListener('load', startExperiment);